Means for agitating and stirring molten metal in open-hearth and like furnaces



1,635,037- J. EDWARDS Immune AND s'rnmme noun IB'I'AL OBEN HEART AND LIKE FURNACES 3 Shuts-Shoal I July 5,1927.

' palms FOE}? Filedrlay 7, 1,926

July 5, 1921,

1,635,037 J. EDWARDS MEANS FOR AGITATING AND STIRRING IGLTBN IBTAL IN OPEN HEARTH AND LIKE FURNACES Filed May '7. 1926 3 Sheets-Sheet 2 IIVVE N70 l 535 037 July 1927 Y J. EDWARDS "BANS FOR AGITATING AND STIRRING MOLTEN METAL v IN OPEN HBARTH AND LIKE FURNACES Filed May 1926 .v .5 Shoots-Sheet;

JEmEaZwaIZZY,

Patented July 5; 1927.

unites-stare 1,635,037 rarest JOHN EDWARDS, OE SVTANSEA, ENG-LAND.

MEANS FOR AGITATING AND STIRRING llIIOLTEN METAL IN OPEN-HEARTH AND LIKE FURNACES.

Application filed May 7 1926, Serial No. 107,393, and in Great Britain September 28, 1925.

theappliance consists of a hollow metal arm 2 covered on the portion which enters the furnace With any suitable refractory material, paddles of refractory materlal being fixed at or near to the end of the arm, the whole.

arm is rotated by suitable mechanism without the furnace, this would be carried on a truck running ,on the charging platform parallel with the furnaces or be supported by an overhead travelling crane or gantry. The arm by means of'the mechanism can be extended into or withdrawn from the furnace in a horizontal position, but when the arm has entered'the door of'the furnace the end of the arm is lowered by .the mechanism so that the paddles enter the bath at an angle and is rotated in this position, thereby agitating the metal with the object of assisting the impurities in coming to the surface. Air may be admitted under pressure through the hollow metal core of the arm for cooling purposes and pass through suitable ducts formed in the core and refractory material to assist the oxidation of the impurities in the molten metal'and reduce time taken for the charge.

In order that this invention may be clearly understood and readily carried into effect I have appended hereto a sheet of drawings illustrating same, wherein Fig. 1 is a side elevation showing the device in use.

Fig.2 is a plan view.

Fig. 3 is a rear elevation.

Fig. 4 is a side elevation of the tilting mechanism. a v Fi 5 is a longitudinal view of the assembled paddles.

Fig. 6 is an end view of the paddker, and

Fig. 7 is a side View of the front end of the shaft for rotating the paddler.

Referring to the drawings the paddler comprises a suitable number and configuration of blades 1 carried by the front end of a hollew metal arm 2. The blades 1 are The arm 2 is hollow and is fitted at its rear. 7

end over the front end of a shaft 6 to which it is locked by a dog clutch device 7 part of which is carried by the arm 2 and the other part by the shaft 6. The nozzle 8, paddler 1 and the arm 2 are covered with a suitable refractory material.

The shaft 6 is rotated from an electric motor or other power unit" 8 which rotates a worm shaft 9, the worm 10 of which meshes with a worm wheel 11 on the shaft 6. Bearings 12 which support the shaft 6 for rotation are carried by brackets 13 which are slidable along a pair of parallel guide rods 14 supported by a rectangular frame 15. Suitable abutments are provided to prevent the shaft 6 moving axially or endwise relatively to the bearings 12, so that if the brackets 13are moved backwards and forwards along the guide rods 14- the paddler 1. can be retracted .or advanced as desired. A suitable method of effecting this movement of the brackets 18 is by means of one or pair of endless chains 16 each engaging an abutment on one of the brackets 13. Each chain is passed around a pair of sprocket wheels 17 one shaft 18 of one of the sprocket wheels having a hand wheel or its equivalent 18 whereby the said shaft 18 may be rotated and the chain or chains carry the bracket 13 backwards or forwards according to requirements. By this means whilst the shaft 6 is rotating the paddler can be moved in or out of the bath 19. The shaft 6 is slidable through the worm wheel 11 and has a squared or other suitable sliding fit in the worm wheel for this purpose.

upper ends to the trzune The Worm shaft 20 has n hand Wheel or its equivalent and this is preferably adjacent the hand Wheel 18 whereby one pe 'utor can adjust simultaneously it need be the tilting of the arm 2 and the :ulvnneingor retraetion o l" the poddler.

The trolley rorrying the npplinnee in prete ably mounted upon wheel; which may truvel over l'tlllF, on ehijiwn in the drawings. The power unit of the deviee may he employed tor tnopelling; the trolley when do sired.

C(llllplt'lfit-ttl nir mny he delivered through the hollow interior of the :irm "l and nozzle 3 into the both of molten met-n1. The inlet into the arm 3 can be \in n eentrul past-nine 26 in the trout end ot the shaft, such noennge lowing n l-titerzd inlet :17 uround \vhioh disposed :1 brorket 13:" vrhieh eon be held t-rtntiol'inry and a (.Oltlfiltldittl air pipe att aehed thereto. The bracket 9%; line :in unnulnr splice surrounding: the 1.lnitt t no that the rotation of the shutt does; not interfere with the admission o't (Ollltflltkittl air into the passage 26.

l. A device for iu itxitin molten metal in an open hmrth turnzu-e minimising n nlm'lt. ugitnting menus curried by mid with mezuri for rotating said ehn't't menus for tilting); said ehzvlh and menus for long itudinelly :idvnueing tllltl retrzu-ting; f-Plt'l ehnt't.

A device for agitating: molten metal in on open h nrth lurnaure emnprieiug :1 trolley. :1 frame tiltnbly mounted on nnid trolley, n nhn tt. mounted in nnid lirnme for rotation and longitudinal movement with rennet-t thereto, agitating meme: *nrried by nnid Sho'tt. l'nezun; for rotating Filld ehnth moons For longitudinally moving the some. and means; for introdueing" compressed air through said nhul't to the metal being agitated.

3. A device tor agitating molten motel in on open hearth furnace (ffilllPi'lF-Slllgi :1 nhnt't, neyitziting menus; married by said shn't'ti, menus for rotating said nl n'll', 21nd, meuuo 'l'or till"- ing Paid nhni't during); rotullion thereof.

4. in eozuhinnlion with :in open hearth l'uruzure. n ll'tWl-I odjzu-eut to mid tl'nruuve. :1 trolley movable along: euid troeln tt rotutulgllo rzhzrtt mounted on nnid trolley tor tilting and ltlll ll'tltlllllll r:ovemento mounting mount: rnrried by said Fhn't't for operation in I: union oi molten metal in the hourth of sold turnnre. meum for rotating mid rhol'h means: to tilt mid shaft. and menu: to move some longi t ud lllltl 1y.

5. A device for curitzitiugg; molten metzd in 21H open henrth 'l uruure comprising :1 troll y. it tr: me tiltnblv nuiiunted on Hillel trolle v. n ehn'tt rotutuhly mounted in said 'l'rzuiun :1 rotatable rlltli ll mouutml on mid trollejvi link eonueetione: between en id lust mentioned theft and mid t'rnme. and menus tor rotating =nid lost in nt ioned uhu l t, thereb to more mid linhs to tilt said frame.

(3. A device for ugg itutiug molten meml in on open hearth l'urunre comprising); at trolley. n trzune tiltnbly mounted on said trolley :1 puir of guide rods extending longitudionl]; 0t mid Fume bearing: members: (tlllltl'i by :iud movubhulong sold guide rod. on agitating nhul't mounted in mid hearing memliiers m nus For rotating nnid nlnvt't; :iud ll'lulllt' 'torsshi'l'ting mid hearing members ulong said guide rods thereby to shi t'tv mid ugitoting shn i't longitudiuullv wit h rwq eet to enid l'rume.

In witness hereof hove Slgllttl thin npeeitiention.

J OHN EDYVAH D fitl 

